问题描述：
about 在这里是什么用法?
Many of the phenomena we want information about are approximately periodic
习惯于something在about后了，看见在前面的还真是不习惯
知道了，我自以忘记了，这是后置
Many of the phenomena we want information about are approximately periodic
习惯于something在about后了，看见在前面的还真是不习惯
知道了，我自以忘记了，这是后置
问题解答：
我来补答展开全文阅读